Types of Risk Management Derivative Instruments Not Formally Designated as Hedges and Their Notional Amounts and Fair Values (Detail) (Nondesignated, Foreign Exchange Contracts, USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Nondesignated | Foreign Exchange Contracts
Derivative [Line Items]
Notional Value	$ 192.3	$ 168.8
Fair Value Asset	0.3	1.0
Fair Value Liability	$ 3.5	$ 1.2